Cheesy Meatball Subs - cooking recipe

Ingredients

1 cup spaghetti sauce
1/2 cup water
2 tablespoons grated parmesan cheese
12 ounces frozen cooked meatballs (3/4 of 1-lb. pkg.)
4 crusty sandwich buns
3/4 cup shredded mozzarella cheese

Preparation

COOMBINE spaghetti sauce, water, Parmesan cheese and meatballs in large skillet. Bring to boil on medium-high heat.
REDUCE heat to medium; simmer 8 minute or until meatballs are heated through, stirring occasionally.
SPOON into buns; sprinkle with mozzarella cheese.